Should diastolic and systolic blood pressure be considered for cardiovascular risk evaluation: a study in middle-aged men and women

OBJECTIVES The goal of this study was to evaluate the role of diastolic blood pressure (DBP) in cardiovascular mortality for different systolic blood pressure (SBP) levels in middle-aged men and women. BACKGROUND In middle-aged subjects it is unclear whether DBP, in addition to SBP, should be considered for risk evaluation. METHODS Subjects (77,023 men; 48,480 women) aged 40 to 70 years old, had no major cardiovascular disease, no antihypertensive treatment and were examined at the Centre d’Investigations Préventives et Cliniques between 1972 and 1988. Mortality was assessed for an 8- to 12-year period. RESULTS In both genders, cardiovascular mortality increased with the SBP level. In men and women with normal SBP levels, DBP did not influence cardiovascular mortality after adjustment for age and SBP. In men with systolic hypertension, a U-shaped curve relationship between cardiovascular mortality and DBP was observed, with the lowest mortality rates in the group with DBP 90 to 99 mm Hg. Compared with this group, age- and SBP-adjusted cardiovascular mortality was higher by 73% (p < 0.02) in the group with DBP